Scientific and technological research on many areas needs data on surface tension of the used materials, e.g.: thin layer technologies, microelectronics, electronic functional units, sol-gel technologies for material production, development of compound materials, phase separation techniques, matrix systems for chemical reactions, drug carriers, treatment of raw materials, etc. Due to this large interest it was decided to publish this volume on surface tension of liquids and binary liquid mixtures. Since the amount of data exceeds the available space for printing, only one recommended data set for each substance is printed. Therefore, this volume contains a CD-ROM where all available data are provided. The data of the 6th Edition of Landolt- Bornstein Vol. II/3, 1956 ( ) are included in this volume.